#' @useDynLib ggforce
#' @import ggplot2
#' @importFrom Rcpp sourceCpp
#'
#' @examples
#' rocketData <- data.frame(
#'   x = c(1, 1, 2, 2),
#'   y = c(1, 2, 2, 3)
#' )
#' rocketData <- do.call(rbind, lapply(seq_len(500) - 1, function(i) {
#'   rocketData$y <- rocketData$y - c(0, i / 500)
#'   rocketData$group <- i + 1
#'   rocketData
#' }))
#' rocketData2 <- data.frame(
#'   x = c(2, 2.25, 2),
#'   y = c(2, 2.5, 3)
#' )
#' rocketData2 <- do.call(rbind, lapply(seq_len(500) - 1, function(i) {
#'   rocketData2$x[2] <- rocketData2$x[2] - i * 0.25 / 500
#'   rocketData2$group <- i + 1 + 500
#'   rocketData2
#' }))
#'
#' ggplot() + geom_link(aes(
#'   x = 2, y = 2, xend = 3, yend = 3, alpha = ..index..,
#'   size = ..index..
#' ), colour = 'goldenrod', n = 500) +
#'   geom_bezier(aes(x = x, y = y, group = group, colour = ..index..),
#'     data = rocketData
#'   ) +
#'   geom_bezier(aes(x = y, y = x, group = group, colour = ..index..),
#'     data = rocketData
#'   ) +
#'   geom_bezier(aes(x = x, y = y, group = group, colour = 1),
#'     data = rocketData2
#'   ) +
#'   geom_bezier(aes(x = y, y = x, group = group, colour = 1),
#'     data = rocketData2
#'   ) +
#'   geom_text(aes(x = 1.65, y = 1.65, label = 'ggplot2', angle = 45),
#'     colour = 'white', size = 15
#'   ) +
#'   coord_fixed() +
#'   scale_x_reverse() +
#'   scale_y_reverse() +
#'   scale_alpha(range = c(1, 0), guide = 'none') +
#'   scale_size_continuous(
#'     range = c(20, 0.1), trans = 'exp',
#'     guide = 'none'
#'   ) +
#'   scale_color_continuous(guide = 'none') +
#'   xlab('') + ylab('') +
#'   ggtitle('ggforce: Accelerating ggplot2') +
#'   theme(plot.title = element_text(size = 20))
"_PACKAGE"
